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American, US Airways tweak fees, mileage rules

If you use miles to get a free ticket on American Airlines, you may have to pay to check your suitcase.

American and US Airways announced changes Tuesday to their policies on checked-bag fees and redeeming miles for free flights.

Passengers traveling on American on miles they earned or who paid full price for an economy seat won't get to check two bags for free anymore. Some elite-level frequent fliers on both airlines will get one less free bag than before.

As for redeeming miles for free flights, US Airways is ending blackout days. American will change the number of miles to get an unrestricted free flight - more on popular travel days, fewer on less-busy ones.

The two carriers merged in December and formed American Airlines Group Inc.